Earth Hour Gains Momentum

WWF produced this public service announcement for Earth Hour, when up to a billion people worldwide are expected to show support for slowing global warming by turning off lights on March 28, 2009, from 8:30 p.m. to 9:30 p.m. local time.

Earth Hour Gains Momentum

WWF produced this public service announcement for Earth Hour, when up to a billion people worldwide are expected to show support for slowing global warming by turning off lights on March 28, 2009, from 8:30 p.m. to 9:30 p.m. local time.

Earth Hour Gains Momentum

WWF produced this public service announcement for Earth Hour, when up to a billion people worldwide are expected to show support for slowing global warming by turning off lights on March 28, 2009, from 8:30 p.m. to 9:30 p.m. local time.